The project-level tolerances for time and cost might be set to zero to focus only on managing the quantity of what is delivered (see note below).

Note: the term "tolerance" is used in its common language form in PRINCE2 Agile, which is not compatible with PRINCE2's definition of tolerance, whichis used with Manage by Exception Principle to show who should decide on corrective actions. Setting zero tolerances is not a way of fixing a target, while it's incorrectly described so in PRINCE2 Agile. More on this in the Targets article.